18194

Appears in sequences

• Denominators of continued fraction for left factorial.at n=20A056890
• Main diagonal of the square array A096583, in which the n-th diagonal equals the convolution of the n-th row with the antidiagonal sums (A096584).at n=14A096585
• Number of permutations of 1..n containing the relative rank sequence { 135246 } at any spacing.at n=3A159097
• G.f.: A(x) = exp( Sum_{n>=1} A179305(n)*x^n/n ), where A179305(n) = Sum_{d|n} C(n,d)*sigma(d).at n=14A179304
• Numbers n such that n!3 + 3 is prime, where n!3 = n!!! is a triple factorial number (A007661).at n=39A249400
• Numbers k such that (10^(k+4)*7 - 36763)/9 is prime (k > 0).at n=14A265309
• a(n) = n*(15*n^2 - 15*n + 4).at n=11A272134